Health monitoring bracelet based on nRF52832

Abstract

The utility model relates to the technical field of health monitoring, in particular to a health monitoring bracelet based on nRF52832. The system comprises an nRF52832 main controller module, a physiological information acquisition module, an alarm module, a one-key starting module, a behavior detection module, a power supply module, an indoor positioning module and an outdoor positioning module, the physiological information acquisition module, the one-key starting module, the behavior detection module, the indoor positioning module and the outdoor positioning module are respectively connected with the nRF52832 main controller module through pins, and the alarm module is connected with the nRF52832 main controller module through an NMOS (N-channel Metal Oxide Semiconductor) tube. The power supply module is connected with the nRF52832 main controller module, the physiological information acquisition module, the alarm module, the one-key starting module, the behavior detection module, the indoor positioning module and the outdoor positioning module through CMOS (complementary metal oxide semiconductor) tubes. Compared with a master controller of the same type, the operation speed is higher, and the operation is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of health monitoring, in particular to a health monitoring wristband based on nRF52832. Background Art

[0002] With the advancement of science and technology and the intensification of the aging population, the issue of smart health care for the elderly has received increasing attention. Smart health care aims to provide more convenient, efficient and personalized health management services for the elderly through the use of modern scientific and technological means. However, traditional health management methods often have many shortcomings, such as the tediousness of regular visits to medical institutions for examinations and the inconvenience of manually recording health data. Therefore, a device that can monitor, record and analyze health data in real time has become an urgent need for the elderly.

[0003] Smart health monitoring monitors the movement status of the wearer of the bracelet. By analyzing these data through algorithms, the wearer's posture changes, such as falls, can be detected. Once an accident occurs, it can respond quickly and trigger an alarm mechanism to provide safety protection for the elderly. By monitoring the heart rate changes of the elderly in real time, their physical condition and health status can be reflected. Continuous monitoring and analysis of heart rate data can help to timely discover potential health problems, such as arrhythmia and heart disease, and provide timely medical advice and life guidance for the elderly. Traditional health monitoring bracelets have great limitations in posture detection and heart rate monitoring. The sensor of the bracelet is too large and the accuracy is insufficient, resulting in inaccurate posture change detection and inability to timely identify the wearer's fall or other abnormal postures. At the same time, the heart rate monitoring function may also be affected by interference or errors, and cannot continuously and accurately reflect the wearer's heart rate changes. When the user's body is abnormal, the traditional health monitoring bracelet also lacks targeted prompts. In addition, the current health monitoring bracelet lacks stable and accurate indoor / outdoor positioning functions. Through precise outdoor / indoor positioning, it meets the positioning needs of the elderly in outdoor activities, and provides precise location information in indoor environments, providing accurate location tracking and rescue services for family members or medical staff. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to provide a health monitoring bracelet based on nRF52832.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] The invention discloses a health monitoring wristband based on nRF52832, comprising an nRF52832 main controller module, a physiological information collection module, an alarm module, a one-key start module, a behavior detection module, a power module, an indoor positioning module and an outdoor positioning module. The physiological information collection module, the one-key start module, the behavior detection module, the indoor positioning module and the outdoor positioning module are respectively connected with the nRF52832 main controller module through pins, the alarm module is connected with the nRF52832 main controller module through an NMOS tube, and the power module is connected with the nRF52832 main controller module, the physiological information collection module, the alarm module, the one-key start module, the behavior detection module, the indoor positioning module and the outdoor positioning module through a CMOS tube.

[0007] Furthermore, the behavior detection module is an LSM6DSLTR 6-axis inertial sensor, including an accelerometer and a gyroscope, pin 14 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 4 of the nRF52832 main controller module, pin 13 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 3 of the nRF52832 main controller module, and pin 9 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 5 of the nRF52832 main controller module.

[0008] Furthermore, the outdoor positioning module is a GPS module, pin 3 of the GPS module is connected to pin 41 of the nRF52832 main controller module, pin 4 of the GPS module is connected to pin 40 of the nRF52832 main controller module, and pin 5 of the GPS module is connected to pin 39 of the nRF52832 main controller module.

[0009] Furthermore, the indoor positioning module is a UWB positioning module, pin 3 of the UWB positioning module is connected to pin 10 of the nRF52832 main controller module, pin 17 of the UWB positioning module is connected to pin 9 of the nRF52832 main controller module, pin 18 of the UWB positioning module is connected to pin 8 of the nRF52832 main controller module, pin 19 of the UWB positioning module is connected to pin 7 of the nRF52832 main controller module, pin 20 of the UWB positioning module is connected to pin 6 of the nRF52832 main controller module, and pin 22 of the UWB positioning module is connected to pin 42 of the nRF52832 main controller module.

[0010] Furthermore, the alarm module includes a motor connected to the nRF52832 main controller, pin 38 of the nRF52832 main controller module is connected to the gate of the NMOS tube through a resistor R16, the drain of the NMOS tube is connected to the anode of the diode, the cathode of the diode is connected to the VDD terminal, the cathode of the diode is grounded through a capacitor C33, the cathode of the diode is connected to the positive pole of the motor of the alarm module, and the anode of the diode is connected to the negative pole of the motor of the alarm module.

[0011] Furthermore, the power module includes a 3.7V lithium battery, a charging module and a discharging module, and the discharging module is connected to the nRF52832 main controller module, the physiological information collection module, the alarm module, the one-button start module, the behavior detection module, the indoor positioning module and the outdoor positioning module through a CMOS tube.

[0012] Furthermore, three LED lamps are included. Pin 22 of the nRF52832 main controller module is connected to the positive pole of LED lamp D4 through resistor R19, and the negative pole of LED lamp D4 is grounded. Pin 23 is connected to the positive pole of LED lamp D5 through resistor R18, and the negative pole of LED lamp D5 is grounded. Pin 37 is connected to the positive pole of LED lamp D3 through resistor R17, and the negative pole of LED lamp D3 is grounded.

[0013] Furthermore, the physiological information acquisition module adopts a MAX30102 module, pin 2 of the MAX30102 module is connected to pin 3 of the nRF52832 main controller module, pin 3 of the MAX30102 module is connected to pin 4 of the nRF52832 main controller module, and pin 13 of the MAX30102 module is connected to pin 43 of the nRF52832 main controller module.

[0014] Furthermore, the one-key start module includes a switch S1, a pin 1 of the switch S1 is connected to a pin 11 of the nRF52832 main controller module, and a pin 2 of the switch S1 is grounded.

[0015] Furthermore, it also includes a voltage regulator, wherein pin 4 of the voltage regulator is connected to the drain of the PMOS tube, the gate of the PMOS tube is connected to pin 14 of the nRF52832 main controller module, pin 4 of the voltage regulator is connected to the VDD terminal for outputting a 3.3V voltage, and pin 1 of the voltage regulator is connected to the VDD terminal for outputting a 1.8V voltage.

[0016] Compared with the prior art, the utility model has the following significant advantages: using nRF52832 as the main controller for system development not only reduces the cost, but also runs faster and more stably than the main controllers of the same type. The alarm module is used for vibration prompts, and when the behavior detection module and the physiological information acquisition module obtain abnormal information, they can send vibrations to remind the user. The user's indoor positioning data is obtained through the indoor positioning module to accurately obtain the user's location. The input voltage is stabilized by adding a voltage regulator, and the module chip internal register is read and written to make it work in a state with a suitable range and a high sampling frequency. Only sensor chips are used instead of sensor modules to reduce the size of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a health monitoring wristband based on nRF52832 in the utility model;

[0018] Figure 2 This is a schematic diagram of the specific connection between some functional modules of the utility model and the nRF52832 main controller;

[0019] Figure 3 This is a schematic diagram of the discharge module of the utility model;

[0020] Figure 4 This is a schematic diagram of the charging module of the utility model.

[0021] Description of main component symbols:

[0022] C3, C4, C5, C7, C13, C15, C16, C20, C22, C24, C31, C32, C33 are 0.1uF capacitors, C9 is a 0.8pF capacitor, C10, C11 are 1pF capacitors, C1, C19, C26, C28 are 1uF capacitors, C12 is a 1.2pF capacitor, C14, C18, C23, C25, C27, C29, C30 are 10uF capacitors, C2, C6 are 15pF capacitors, C21 is a 22uF capacitor, C8, C17 are 100pF capacitors, R2, R3, R12 are 0 ohms The resistor is 4.7K ohm, R1, R8, R9, R13, R16, R17, R18 and R19 are 10K ohm resistors, R5, R6, R7, R10 and R11 are 100K ohm resistors, R4 is a 470K ohm resistor, L1 is a 15nH inductor, L2 is a 10uH inductor, L3 is a 3.9nH inductor, L4 is a 3.3uH inductor, S1 is a switch, Y1 is a 32MHz crystal oscillator, D1, D3, D4 and D5 are LED lights, D2 is a diode, F1 is a fuse, J1 is a Bluetooth antenna, and J2 is a Micro USB port, Q1, Q2, Q3, Q4 are PMOS tubes, Q5 is NMOS tube, U1 is GT-U13 module, U2 is LSM6DSLTR6-axis inertial sensor, U3 is ME3102C chip, U4 and U9 are MD5133 chip, U5 is MD5118 voltage regulator, U6 is SE9016 chip, U7 is MAX30102 chip, U8 is BU01 module, U10 is nRF52832 main controller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The utility model provides a health monitoring bracelet based on nRF52832, such as Figure 1As shown, it includes an nRF52832 main controller module 2, and a physiological information acquisition module 1, an alarm module 3, a one-button start module 4, a behavior detection module 5, a power module 6, an indoor positioning module 7, an outdoor positioning module 8 and three LED lights connected to the nRF52832 main controller module 2. The physiological information acquisition module 1, the one-button start module 4, the behavior detection module 5, the indoor positioning module 7, the outdoor positioning module 8 and the three LED lights are respectively connected to the nRF52832 main controller module 2 through pins, the alarm module 3 is connected to the nRF52832 main controller module 2 through an NMOS tube, and the power module 6 is connected to the nRF52832 main controller module 2, the physiological information acquisition module 1, the alarm module 3, the one-button start module 4, the behavior detection module 5, the indoor positioning module 7 and the outdoor positioning module 8 through a CMOS tube.

[0025] The physiological information acquisition module 1 is used to collect PPG data and exchange data with the nRF52832 main controller module 2. PPG refers to a sensor that uses photoplethysmography technology to detect the heart rate of human body movements. In this embodiment, it refers to the heart rate and blood oxygen sensors, which detect the reflectivity of light, and the data obtained is PPG data. The behavior detection module 5 exchanges data with the nRF52832 main controller module 2 by collecting gyroscope data and accelerometer data. The indoor positioning module 7 and the outdoor positioning module 8 collect outdoor positioning data and indoor positioning data, and exchange data with the nRF52832 main controller module 2. The nRF52832 main controller module 2 includes a Bluetooth communication module. The above-mentioned PPG data, gyroscope data, accelerometer data, outdoor positioning data and indoor positioning data can be transmitted to the host computer through the Bluetooth function of the Bluetooth communication module of the nRF52832 main controller module 2. Figure 2 As shown, pin 30 of nRF52832 main controller module 2 is grounded through inductor L3, resistor R2 and capacitor C11, one end of capacitor C9 is grounded, and the other end is connected between pin 30 of nRF52832 main controller module 2 and inductor L3, one end of capacitor C10 is grounded, and the other end is connected between inductor L3 and resistor R2, pin 30 of nRF52832 main controller module 2 is connected to pin 1 of Bluetooth antenna through inductor L3, resistor R2 and capacitor C11, pin 30 of nRF52832 main controller module 2 is connected to pin 2 of Bluetooth antenna through inductor L3, resistor R2, capacitor C11 and capacitor C12, and pin 1 of Bluetooth antenna is connected to pin 2 of Bluetooth antenna.

[0026] The behavior detection module 5 includes an accelerometer and a gyroscope. The gyroscope is used to obtain the user's angle change information (gyroscope data); the accelerometer is used to obtain the user's acceleration change information (accelerometer data). The user's angle change information and acceleration change information are exchanged with the nRF52832 main controller module 2 and then transmitted to the host computer to calculate the real-time behavior.

[0027] The outdoor positioning module 8 is a GPS module, which can obtain outdoor positioning data, such as longitude and latitude information, through satellite positioning, and transmit the data to the host computer after exchanging data with the nRF52832 main controller module 2 to obtain the user's real-time geographical location. The indoor positioning module 7 is a UWB positioning module, which communicates with the base station in the environment, and calculates the distance to the base station through the time difference of the round trip of the data packet. After obtaining the distances of three different base stations, the indoor positioning data can be obtained through triangulation.

[0028] The alarm module 3 includes a motor (XHXDZ-0820 vibration motor) connected to the nRF52832 main controller. The motor is used for vibration prompts. When the behavior detection module 5 and the physiological information collection module 1 obtain abnormal information, vibrations are emitted to remind the user.

[0029] The power module 6 includes a 3.7V lithium battery, a charging module and a discharging module. The charging module is composed of a charging chip and its surrounding circuits, and the discharging module is composed of a discharging chip and its surrounding circuits. The power module 6 is connected to the nRF52832 main controller module 2, the physiological information acquisition module 1, the alarm module 3, the one-button start module 4, the behavior detection module 5, the indoor positioning module 7 and the outdoor positioning module 8 to provide the voltage required for all modules to work. Figure 3 As shown, the discharge module includes an MD5133 chip U9, pin 1 of the MD5133 chip U9 is connected to pin 5 of the MD5133 chip U9 through a capacitor C31, pin 1 of the MD5133 chip U9 is grounded through a capacitor C30, pin 5 of the MD5133 chip U9 is connected to one end of the grounded pin of the capacitor C30, pin 1 of the MD5133 chip U9 leads to a VDD_nRF terminal for outputting a 3.3V stable voltage to the nRF52832 main controller module 2 and each module, pin 4 of the MD5133 chip U9 is connected to pin 3 of the MD5133 chip U9, pin 4 of the MD5133 chip U9 is connected to pin 2 of the MD5133 chip U9 through a capacitor C29, pin 4 of the MD5133 chip U9 is grounded through a capacitor C29, and pin 4 of the MD5133 chip U9 is connected to a lithium battery. Figure 4As shown, after the charging power is input into the constant voltage charging chip SE9016 chip U6 through the Micro USB interface, the lithium battery of the power module 6 will enter the charging state. The charging power is connected to pins 10 and 11 of the Micro USB interface, pin 1 of the Micro USB interface is connected to pin 4 of the SE9016 chip U6 through fuse F1, pin 1 of the Micro USB interface is connected to pin 2 of fuse F1, pin 4 of the Micro USB interface is connected to pin 1 of fuse F1, pin 5 of the Micro USB interface is grounded, pin 1 of the SE9016 chip U6 is connected to LED lamp D1 through resistor R8, LED lamp D1 is connected to pin 4 of the Micro USB interface, pin 4 of the Micro USB interface is grounded through capacitor C27, pin 2 of the SE9016 chip U6 is connected to pin 5 of the SE9016 chip U6 through resistor R9, pin 2 of the SE9016 chip U6 is grounded, and pin 3 of the SE9016 chip U6 is connected to the lithium battery.

[0030] The one-key start module 4 is implemented by a button and is used for power on / off control of the wristband. The one-key start module 4 controls the nRF52832 main controller module 2 through the button, and controls the working status of other modules through the nRF52832 main controller module 2.

[0031] The nRF52832 main controller module 2 also includes a crystal oscillator circuit and a reset circuit. The crystal oscillator circuit provides a clock concept for the main controller module, thereby helping the entire system to be deployed in an orderly manner. Figure 2 As shown, the pin 1 of the crystal oscillator Y1 is connected to the pin 34 of the nRF52832 main controller module 2, the pin 3 of the crystal oscillator Y1 is connected to the pin 35 of the nRF52832 main controller module 2, the pin 1 of the crystal oscillator Y1 is connected to the pin 2 of the crystal oscillator Y1 through the capacitor C6, the pin 3 of the crystal oscillator Y1 is connected to the pin 4 of the crystal oscillator Y1 through the capacitor C2, and the pin 2 of the crystal oscillator Y1 and the pin 4 of the crystal oscillator Y1 are grounded. The reset circuit implements the reset function in hardware, and can be directly reset by hardware when a problem occurs in the system without connecting software. The pin 24 of the nRF52832 main controller module 2 is grounded through the capacitor C4, and the pin 24 of the nRF52832 main controller module 2 is connected to the terminal VDD_nRF through the resistor R1.

[0032] PPG collects red light reflectance and infrared light reflectance and calculates the user's heart rate and blood oxygen value through the host computer. The gyroscope data and accelerometer data are transmitted to the host computer and the user's current behavior is calculated through the deep learning model. Based on the user's heart rate, blood oxygen value and current behavior, the host computer can send an alarm message to the bracelet. When the nRF52832 main controller module 2 receives the alarm message from the host computer, the potential changes, and the alarm module 3 generates vibration to remind the user.

[0033] like Figure 2 As shown, the behavior detection module 5 uses the LSM6DSLTR 6-axis inertial sensor U2 to collect accelerometer data and gyroscope data. Pin 14 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to pin 4 of the nRF52832 main controller module 2, pin 14 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to terminal VDD_nRF through resistor R15, pin 13 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to pin 3 of the nRF52832 main controller module 2, pin 13 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to terminal VDD_nRF through resistor R14, pin 9 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to pin 5 of the nRF52832 main controller module 2, pin 12 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to terminal VDD_GYRO, pin 8 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to pin 7 of the LSM6DSLTR 6-axis inertial sensor U2 through capacitor C14, and Pin 8 of the 6-axis inertial sensor U2 is grounded through capacitor C15, pin 8 of the LSM6DSLTR 6-axis inertial sensor U2 is grounded through capacitor C16, pin 8 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to terminal VDD_GYRO, pin 7 of the LSM6DSLTR 6-axis inertial sensor U2 is grounded, pin 6 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to pin 7 of the LSM6DSLTR 6-axis inertial sensor U2, pin 5 of the LSM6DSLTR 6-axis inertial sensor U2 is connected to terminal VDD_GYRO, and pins 1, 2, and 3 of the LSM6DSLTR 6-axis inertial sensor U2 are grounded. The accelerometer range is set to 2g, the acquisition frequency is set to 833hz, the gyroscope range is designed to 1000°, and the acquisition frequency is set to 833hz. The actual data extraction frequency is 50hz. The accelerometer data and gyroscope data are transmitted via the TWI serial bus to the nRF52832 main controller module 2 for processing.

[0034] The outdoor positioning module 8 uses the GT-U13 module U1, the pin 3 of the GT-U13 module U1 is connected to the pin 41 of the nRF52832 main controller module 2, the pin 4 of the GT-U13 module U1 is connected to the pin 40 of the nRF52832 main controller module 2, the pin 5 of the GT-U13 module U1 is connected to the pin 39 of the nRF52832 main controller module 2, the pin 2 of the GT-U13 module U1 is grounded, and the pin 1 of the GT-U13 module U1 is connected to the terminal VDD_GNSS. The GT-U13 module U1 obtains the longitude and latitude information, converts it into a digital signal, and interacts with the nRF52832 main controller module 2 through the uart serial port.

[0035] The indoor positioning module 7 adopts the BU01 module U8. Pin 3 of the BU01 module U8 is connected to pin 10 of the nRF52832 main controller module 2, pin 17 of the BU01 module U8 is connected to pin 9 of the nRF52832 main controller module 2, pin 18 of the BU01 module U8 is connected to pin 8 of the nRF52832 main controller module 2, pin 19 of the BU01 module U8 is connected to pin 7 of the nRF52832 main controller module 2, pin 20 of the BU01 module U8 is connected to pin 6 of the nRF52832 main controller module 2, pin 21 of the BU01 module U8 is connected to pin 24 of the BU01 module U8, and pin 22 of the BU01 module U8 is connected to the nRF52832 main controller module 2 through resistor R13. Pin 24 of BU01 module U8 is connected, pin 22 of BU01 module U8 is connected to pin 42 of nRF52832 main controller module 2, pin 23 of BU01 module U8 is connected to pin 24 of BU01 module U8, pin 24 of BU01 module U8 is grounded, pin 16 of BU01 module U8 is grounded, pin 8 of BU01 module U8 is grounded, pin 7 of BU01 module U8 is connected to pin 6 of BU01 module U8, pin 6 of BU01 module U8 is connected to pin 5 of BU01 module U8, pin 5 of BU01 module U8 is connected to terminal VDD_UWB, and pin 2 of BU01 module U8 is grounded through resistor R12. BU01 module U8 is an ultra-wideband transceiver module designed based on Decawave's DW1000, with a positioning longitude of up to 10 cm and a data rate of up to 6.8Mbps. It is set to send a ranging request message to the nearby uwb base station every 100ms. After receiving the request message, the base station sends a reply message to the bracelet. By calculating the arrival time difference between the request message and the reply message, and then multiplying it by the speed of light, the distance to the base station can be obtained. BU01 module U8 interacts with nRF52832 main controller module 2 through spi.

[0036] The physiological information acquisition module 1 adopts the MAX30102 module U7. Pin 2 of the MAX30102 module U7 is connected to pin 3 of the nRF52832 main controller module 2, pin 3 of the MAX30102 module U7 is connected to pin 4 of the nRF52832 main controller module 2, pin 4 of the MAX30102 module U7 is grounded, pin 13 of the MAX30102 module U7 is connected to pin 43 of the nRF52832 main controller module 2, pin 12 of the MAX30102 module U7 is grounded, pin 11 of the MAX30102 module U7 is connected to terminal VDD1V8_PPG, and the access voltage is 1.8V, pin 10 of the MAX30102 module U7 is grounded through capacitor C32, pin 10 of the MAX30102 module U7 is connected to terminal VDD3V3_PPG, and the access voltage is 3.3V, and pin 9 of the MAX30102 module U7 is connected to pin 10 of the MAX30102 module U7. MAX30102 module U7 collects the reflection intensity of red light and infrared light. The faster the blood flows, the greater the reflection intensity. After filtering the reflection intensity, the peak and average calculations can be used to obtain the heart rate. The data acquisition frequency is set to 100hz, and the LED current of red light and infrared light is set to about 9mA. MAX30102 module U7 uses TWI to interact with nRF52832 main controller module 2.

[0037] Pin 1 of switch S1 of one-key start module 4 is connected to pin 11 of nRF52832 main controller module 2, and pin 2 of switch S1 is grounded. By changing the pin level of nRF52832 main controller module 2, an interrupt is generated to control the working state of the bracelet. The button control is triggered by the falling edge to initialize the GPIO parameters (including clock) and other parameters of nRF52832 main controller module 2. Set the delay to eliminate jitter, release it after pressing for 5 seconds, release all GPIO interfaces, turn off the SPI bus and TWI bus, and the nRF52832 main controller enters the shutdown state. Pin 12 of nRF52832 main controller module 2 is connected to the gate of PMOS tube Q3, the gate of PMOS tube Q3 is connected to the source of PMOS tube Q3 through resistor R10, the source of PMOS tube Q3 is connected to the lithium battery, the drain of PMOS tube Q3 is grounded through capacitor C26, and the drain of PMOS tube Q3 is connected to terminal VDD_GNSS, which is used to control the start and shutdown of outdoor positioning module 8. Pin 14 of nRF52832 main controller module 2 is connected to the gate of PMOS tube Q2, the gate of PMOS tube Q2 is connected to the source of PMOS tube Q2 through resistor R7, the source of PMOS tube Q2 is connected to terminal VDD_nRF, the drain of PMOS tube Q2 is grounded through capacitor C25, the drain of PMOS tube Q2 is connected to pin 4 of MD5118 voltage regulator U5, pin 4 of MD5118 voltage regulator U5 is connected to terminal VDD3V3_PPG, outputting 3.3V voltage, MD5118 voltage regulator U Pin 2 of MD5118 voltage regulator U5 is connected to the ground pin of capacitor C25, pin 3 of MD5118 voltage regulator U5 is connected to pin 4 of MD5118 voltage regulator U5, pin 5 of MD5118 voltage regulator U5 is connected to pin 2 of MD5118 voltage regulator U5, pin 1 of MD5118 voltage regulator U5 is grounded through parallel capacitors C23 and C24 signals, pin 1 of MD5118 voltage regulator U5 is connected to terminal VDD1V8_PPG, and outputs a 1.8V voltage to control the startup and shutdown of the physiological information acquisition module 1. Pin 16 of the nRF52832 main controller module 2 is connected to the gate of the PMOS tube Q4, the gate of the PMOS tube Q4 is connected to the source of the PMOS tube Q4 through the resistor R11, the source of the PMOS tube Q4 is connected to the terminal VDD_nRF, the drain of the PMOS tube Q4 is grounded through the capacitor C28, and the drain of the PMOS tube Q4 is connected to the terminal VDD_GYRO, which is used to control the startup and shutdown of the behavior detection module 5.Pin 17 of nRF52832 main controller module 2 is connected to the gate of PMOS tube Q1, the gate of PMOS tube Q1 is connected to the source of PMOS tube Q1 through resistor R5, the source of PMOS tube Q1 is connected to the lithium battery, the drain of PMOS tube Q1 is grounded through parallel capacitors C21 and C22, the drain of PMOS tube Q1 is connected to pin 5 of ME3102C chip U3, the parallel capacitors C21 and C22 are connected to pin 7 of ME3102C chip U3, pin 5 of ME3102C chip U3 is connected to pin 4 of ME3102C chip U3, pin 7 of ME3102C chip U3 is connected to pin 6 of ME3102C chip U3, pin 1 of ME3102C chip U3 is connected to pin 4 of MD5102C chip U3 through inductor L4 and resistor R3, and MD5102C chip U3 is connected to pin 4 of MD5102C chip U3. Pin 4 of the 33 chip U4 is connected to the terminal VDD_3V4, the pin of the inductor L4 connected to the resistor R3 is grounded through the capacitor 17 and the resistor R6, the pin of the inductor L4 connected to the resistor R3 is connected to the pin 3 of the ME3102C chip U3 through the resistor R4, the pin 2 of the ME3102C chip U3 is grounded, the pin of the resistor R3 connected to the pin 4 of the MD5133 chip U4 is grounded through the capacitor C18, the pin 2 of the MD5133 chip U4 is grounded, the pin 3 of the MD5133 chip U4 is connected to the pin 4 of the MD5133 chip U4, the pin 5 of the MD5133 chip U4 is grounded, the pin 1 of the MD5133 chip U4 is grounded through the parallel capacitors C19 and C20, and the parallel capacitors C19 and C20 are connected to the terminal VDD_UWB, which is used to control the startup and shutdown of the indoor positioning module 7. When the pins 10, 14, 16, and 17 of the nRF52832 main controller module 2 output low level, the corresponding controlled module enters the working state. By adding a voltage regulator to stabilize the input voltage, the module chip internal register is read and written to make it work in a state with a suitable range and a high sampling frequency.

[0038] Pin 38 of the nRF52832 main controller module 2 is connected to the gate of the NMOS tube Q5 through the resistor R16, the drain of the NMOS tube Q5 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the terminal VDD_nRF, the cathode of the diode D2 is grounded through the capacitor C33, the cathode of the diode D2 is connected to the positive electrode of the motor of the alarm module 3, and the anode of the diode D2 is connected to the negative electrode of the motor of the alarm module 3, which is used to control the alarm module 3. When pin 38 outputs a high level, the motor vibrates.

[0039] Pin 22 of nRF52832 main controller module 2 is connected to the positive pole of LED lamp D4 through resistor R19, and the negative pole of LED lamp D4 is grounded. Pin 23 is connected to the positive pole of LED lamp D5 through resistor R18, and the negative pole of LED lamp D5 is grounded. Pin 37 is connected to the positive pole of LED lamp D3 through resistor R17, and the negative pole of LED lamp D3 is grounded. The three LED lamps are used to indicate different working states of the bracelet. In this embodiment, when LED lamp D3 is on, it means that nRF52832 main controller module 2 starts working, when LED lamp D5 is on, it means that nRF52832 main controller module 2 is connected to the host computer, and LED lamp D4 is set to flash every 1 second, indicating that each module of the bracelet is working normally.

[0040] Pin 1 of nRF52832 main controller module 2 is grounded through capacitor C7, pin 13 of nRF52832 main controller module 2 is grounded through capacitor 13, pin 13 of nRF52832 main controller module 2 is connected to terminal VDD_nRF, pin 25 of nRF52832 main controller module 2 is connected to clock SWDCLK, pin 26 of nRF52832 main controller module 2 is connected to burning pin SWDIO, pin 32 of nRF52832 main controller module 2 is grounded, pin 33 of nRF52832 main controller module 2 is grounded through capacitor C8, pin 36 of nRF52832 main controller module 2 is grounded through capacitor C5, nRF5 Pin 36 of nRF52832 main controller module 2 is connected to terminal VDD_nRF, pin 45 of nRF52832 main controller module 2 is connected to pin 46 of nRF52832 main controller module 2 through capacitor C1, pin 45 of nRF52832 main controller module 2 is grounded, pin 45 of nRF52832 main controller module 2 is connected to pin 47 of nRF52832 main controller module 2 through inductors L1 and L2, pin 48 of nRF52832 main controller module 2 is grounded through capacitor C3, pin 48 of nRF52832 main controller module 2 is connected to terminal VDD_nRF, and pin 49 of nRF52832 main controller module 2 is grounded.

[0041] The utility model provides a health monitoring bracelet based on nRF52832, which can not only periodically detect the motion state of users (especially the elderly) and output the motion state in digital form, but also further monitor the physiological condition of users (especially the elderly), and issue a warning if an unexpected situation occurs. At the same time, the data information output by the system can be transmitted to the receiving device via the Bluetooth protocol for further analysis and processing. In addition, the use of nRF5283 as the main controller for system development not only reduces the cost, but also runs faster and more stably than the same type of main controller.

[0042] The above-mentioned embodiments only express one or several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A health monitoring bracelet based on nRF52832, characterized in that: The invention comprises an nRF52832 main controller module, a physiological information acquisition module, an alarm module, a one-key start module, a behavior detection module, a power module, an indoor positioning module and an outdoor positioning module. The physiological information acquisition module, the one-key start module, the behavior detection module, the indoor positioning module and the outdoor positioning module are respectively connected with the nRF52832 main controller module through pins, the alarm module is connected with the nRF52832 main controller module through an NMOS tube, and the power module is connected with the nRF52832 main controller module, the physiological information acquisition module, the alarm module, the one-key start module, the behavior detection module, the indoor positioning module and the outdoor positioning module through a CMOS tube.

2. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The behavior detection module is an LSM6DSLTR 6-axis inertial sensor, including an accelerometer and a gyroscope. Pin 14 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 4 of the nRF52832 main controller module, pin 13 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 3 of the nRF52832 main controller module, and pin 9 of the LSM6DSLTR 6-axis inertial sensor is connected to pin 5 of the nRF52832 main controller module.

3. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The outdoor positioning module is a GPS module, pin 3 of the GPS module is connected to pin 41 of the nRF52832 main controller module, pin 4 of the GPS module is connected to pin 40 of the nRF52832 main controller module, and pin 5 of the GPS module is connected to pin 39 of the nRF52832 main controller module.

4. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The indoor positioning module is a UWB positioning module, pin 3 of the UWB positioning module is connected to pin 10 of the nRF52832 main controller module, pin 17 of the UWB positioning module is connected to pin 9 of the nRF52832 main controller module, pin 18 of the UWB positioning module is connected to pin 8 of the nRF52832 main controller module, pin 19 of the UWB positioning module is connected to pin 7 of the nRF52832 main controller module, pin 20 of the UWB positioning module is connected to pin 6 of the nRF52832 main controller module, and pin 22 of the UWB positioning module is connected to pin 42 of the nRF52832 main controller module.

5. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The alarm module includes a motor connected to the nRF52832 main controller, pin 38 of the nRF52832 main controller module is connected to the gate of the NMOS tube through a resistor R16, the drain of the NMOS tube is connected to the anode of the diode, the cathode of the diode is connected to the VDD terminal, the cathode of the diode is grounded through a capacitor C33, the cathode of the diode is connected to the positive pole of the motor of the alarm module, and the anode of the diode is connected to the negative pole of the motor of the alarm module.

6. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The power module includes a 3.7V lithium battery, a charging module and a discharging module. The discharging module is connected to the nRF52832 main controller module, the physiological information collection module, the alarm module, the one-key start module, the behavior detection module, the indoor positioning module and the outdoor positioning module through a CMOS tube.

7. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: It also includes three LED lamps. Pin 22 of the nRF52832 main controller module is connected to the positive electrode of LED lamp D4 through resistor R19, and the negative electrode of LED lamp D4 is grounded. Pin 23 is connected to the positive electrode of LED lamp D5 through resistor R18, and the negative electrode of LED lamp D5 is grounded. Pin 37 is connected to the positive electrode of LED lamp D3 through resistor R17, and the negative electrode of LED lamp D3 is grounded.

8. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The physiological information acquisition module adopts the MAX30102 module, the pin 2 of the MAX30102 module is connected to the pin 3 of the nRF52832 main controller module, the pin 3 of the MAX30102 module is connected to the pin 4 of the nRF52832 main controller module, and the pin 13 of the MAX30102 module is connected to the pin 43 of the nRF52832 main controller module.

9. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: The one-key start module comprises a switch S1, a pin 1 of the switch S1 is connected to a pin 11 of the nRF52832 main controller module, and a pin 2 of the switch S1 is grounded.

10. The nRF52832-based health monitoring bracelet according to claim 1, characterized in that: It also includes a voltage regulator, wherein pin 4 of the voltage regulator is connected to the drain of the PMOS tube, the gate of the PMOS tube is connected to pin 14 of the nRF52832 main controller module, pin 4 of the voltage regulator is connected to the VDD terminal for outputting a 3.3V voltage, and pin 1 of the voltage regulator is connected to the VDD terminal for outputting a 1.8V voltage.

Images